[DNSOP] DNS-designated Public Key Authorities (DKA)

All:

Greetings.

Based on feedback, a new version of "Domain Key Authorities (DKA): DNS-Designated Public Key Distribution for Email-Address Identifiers” has been submitted.

https://datatracker.ietf.org/doc/draft-swaminathan-dka-framework/


Abstract: Email-addresses are widely used beyond email itself, and
the Domain Key Authority (DKA) framework provides a DNS-anchored
mechanism for discovering public keys associated with those identifiers. A
domain uses DNS to designate an authoritative key service for email-address
identifiers under that domain. Instead of storing per-user public keys in DNS,
the domain publishes a lightweight DNS record (HTTPS and/or TXT) identifying the
hostname of its Domain Key Authority (DKA), and clients retrieve
selector-scoped public keys from the DKA over HTTPS. This design
uses DNS for what it does well -- global discovery and delegation -- while
moving per-identifier key storage and retrieval to infrastructure that
scales independently of DNS. The result is a DNS-anchored, application-
agnostic framework for discovering public keys associated with
email-address identifiers. The current draft adds HTTPS DNS record and
retains TXT records for backward compatibility, and provides a deterministic
DKA discovery and key lookup procedure.

The concept is not theoretical: an open-source implementation and a demo site exist at https://keyzero.org<https://keyzero.org/>.

All comments appreciated.

Kishore Swaminathan

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